transactionConfirmationData property
The transaction confirmation data, if any, to be presented to the user for verification.
If this data is present, data must be presented to the user before authenticating. Note that in the case of registration or authentication not involving transaction confirmation, this is typically empty and thus, it does not require handling. The contents are the base64 URL decoded contents of the Transaction as described in the FIDO UAF specification.
Returns: the transaction confirmation data
Implementation
String? get transactionConfirmationData;